Simplistic question

[Jon]

I have a very simple question.  Because I cheat and use Bastille to set up
my netfilter, I don't know how to do this:

main box is NAT. Dial up ppp connection external, eth0 internal,
masquerade for the rest of the house on 192.168.1.X numbered network.

I need something that will tell the firewall to forward any requests for
port 80 on to 192.168.1.22. 

Any help would be sorely appreciated.  Since I am not a member of this
list, please reply to my address.

Jon R

PGP Key fingerprint = 12 DA FC 06 AB 4C D6 A4  DE 03 E0 77 D6 DE E0 73
PGP public key available by fingering jon@mhost.com